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How scientists test face mask effectiveness against coronavirus
June 21, 202002:04
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Nightly News

How scientists test face mask effectiveness against coronavirus

02:04

Scientists around the world have conducted research that finds wearing face masks can significantly decrease the spread of the coronavirus by blocking droplets created when a person coughs, sneezes, or talks that would carry the virus.June 21, 2020

Get more newsHow scientists test face mask effectiveness against coronavirusNBC News LogoSearchSearchLiveLiveNBC News LogoToday Logo - Analysis & Updates [2026-10-01] | Latest News Todayon
  • UP NEXT

    Cornell agrees to independent investigation into handling of rape allegations

    02:44

  • Good News: High school football team surprises mom fighting cancer with flowers

    01:21

  • Passengers stop co-pilot’s attempt to crash plane

    03:48

  • Chicago mom’s gig work to make ends meet

    02:31

  • Flooding triggers State of Emergency

    01:13

  • New questions over airline security after attack

    02:14
Get more newsHow scientists test face mask effectiveness against coronavirusNBC News LogoSearchSearchLiveLiveNBC News LogoToday Logo - Analysis & Updates [2026-10-01] | Latest News Todayon

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Last Updated: Thursday, October 1, 2026 at 06:39 PM
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